CCNA EIGRP LAB Question
Question
After adding R3 router, no routing updates are being exchanged between R3 and the new location. All other inter connectivity and Internet access for the existing locations of the company are working properly.
The task is to identify the fault(s) and correct the router configuration to provide full connectivity between the routers.
Access to the router CLI can be gained by clicking on the appropriate host. All passwords on all routers are cisco.
IP addresses are listed in the chart below.
R1 Fa0/0: 192.168.77.33 S1/0: 198.0.18.6 S0/1: 192.168.60.25 S0/0: 192.168.36.13 |
R2 Fa0/0: 192.168.60.97 Fa0/1: 192.168.60.113 S0/0: 192.168.36.14 |
R3 Fa0/0: 192.168.77.34 Fa0/1: 192.168.60.65 Fa1/0: 192.168.60.81 |
R4 Fa0/0: 192.168.60.129 Fa0/1: 192.168.60.145 S0/1: 192.168.60.26 |
Answer and explanation
(Note: If you are not sure how EIGRP works, please read my EIGRP tutorial: http://www.9tut.com/eigrp-routing-protocol-tutorial. Note: You can download this sim to practice here: http://www.9tut.com/download/9tut.com_CCNA_EIGRP_sim_question.zip)
We should check the configuration of the new added router first because it does not function properly while others work well. From the command line interface of R3 router, enter the show running-config command
From the output above, we know that this router was wrongly configured with an autonomous number (AS) of 22. When the AS numbers among routers are mismatched, no adjacency is formed.
(You should check the AS numbers on other routers for sure)
To solve this problem, we simply re-configure router R3 with the following commands:
R3>enable (you have to enter cisco as its password here)
R3#configure terminal
R3(config)#no router eigrp 22
R3(config)#router eigrp 212
R3(config-router)#network 192.168.60.0
R3(config-router)#network 192.168.77.0
R3(config-router)#no auto-summary
R3(config-router)#end
R3#copy running-config startup-config
Check R1 router with the show running-config command:
Notice that it is missing a definition to the network R3. Therefore we have to add it so that it can recognize R3 router
R1>enable (you have to enter cisco as its password here)
R1#configure terminal
R1(config)#router eigrp 212
R1(config-router)#network 192.168.77.0
R1(config-router)#end
R1#copy running-config startup-config
Now the whole network will work well. You should check again with ping command from router R3 to other routers!
Modifications:
Maybe in this EIGRP Sim you will see the “passive-interface …” command somewhere in R1 configuration. If the link between R1 to R2; or R1 to R3; or R1 to R4) routers has the “passive interface” then we have to remove it with the “no passive-interface …” command because it prevents EIGRP update from being sent on that interface. But if the “passive interface” is applied to the link between R1 and ISP router like this:
R1:
!
router eigrp 212
passive-interface s1/0
!
then we just leave it. Don’t use the “no passive-interface s1/0″ on R1 because the link between R1 & ISP doesn’t need EIGRP to run on it. A static route from R1 to ISP & “ip default-network” command in R1 are correct so that all the routers (R1, R2, R3, R4) can access the Internet.
(Note: The “ip default-network” command in R1 will advertise the static route of R1 (to go to the Internet) to other routers (R2,R3,R4) so that they can access the Internet too). In the exam you will see these lines in R1 configuration:
!
ip default-network 198.0.18.0
ip route 0.0.0.0 0.0.0.0 198.0.18.5
!
If you want to learn more about “ip default-network” command please read: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094374.shtml
I read recent comments and realized that you will see the “passive-interface” in the link between R1 & ISP router so just leave it.
Note: Also some readers confuse about if we should use the wildcard masks on the “network” statements under EIGRP process or not. For example should we use:
router eigrp 212
network 192.168.77.0 0.0.0.3
The answer is: we can use wildcard masks or not, it does not matter. Not having a wildcard mask does not make the routes conflicting. The “network …” command in EIGRP (and OSPF, RIP) does not means “advertise this network” but means “If I has interface(s) belongs to this network please turn on EIGRP on that interface. Therefore when you don’t use wildcard mask EIGRP will turn on EIGRP on all interfaces that belongs to the network you specify in the “network …” command.
You should only use wildcard mask on EIGRP if you have 2 or more interfaces that belong to the same major networks but you don’t want to run EIGRP on all of them. For example if your router has 2 interfaces whose IP addresses are 192.168.30.1/28 and 192.168.30.17/28 but you only want to run EIGRP on the first interface, you can type “network 192.168.30.0 0.0.0.15″ under EIGRP process.
Other lab-sims on this site:
CCNA Configuration SIM Question (RIPv2 SIM)
@jambo: the other 3 networks are already config. so we don’t have to write them again.When u write the command of sh running-config on R1, u found there are only 3 networks and there is a missing network so u just add it.
I`am fail exam. Two labs – ACL and eigrp. In lab with eigrp, example 2 – i do all that explain here, but it dosen`t work – I didn`t see the network 192.168.77.0 in running-config. What is wrong?
i failed the exam, i got the eigrp, acl2, and vtp sims. when i retake the test am i likely to get the same sims or will cisco switch them on me?
@ Jimson sorry, failure is not the end. I believe you can make again.
Apart from the stimulation, are other questions valid from the dumps.
I have not looked at the dumps.
I need latest dumps were to get
I need the link pls
Hi,
I did everything you say on your explanation but when I ping router 2 it did not work.
Try to go on it and global config was disabled.
It learned about some routes from router 1 but did not have all.
When I check the running config of r2 it did not have any network statements after eigrp 212.
Any ideas of what should I do?
leoaraujo79@gmail.com
leoaraujo79, your problem is that you need to either remove a wrong route and/or add a missing route on the main router -> R1. This is the problem I had last week in the exam and run out of time trying to sort this small thing. To ping successfully you must see all networks on the show ip route listed under D-eigrp. That is all. See my comments on the VTP lab page as well.
@Doc , what is the best method to remove a wrong route from the maon router ?
It might be a daft question , but here we go ..
Thx
@Hunterskil, not at all.. I try to explain as was for me..
the question will tell you that a new router was added but something is wrong. So R1 will remain the main router anyway and this new router connects to it. Ignore the statement that “all other configuration on other routers has been done correctly” as it is that specific statement that made me not realize in time that they had deliberately cooked up the main router eigrp routes. Them liars. So the interface connected to your new router if in say subnet 192.168.44.0, on R1 they will put an entry “network 198.168.52.0″ when network 198.168.52.0 doesn’t exist. On the new router that network was .44 and not .52 => so you have option to just add the .44 and it works but remember question also says “correct the problem” so:
R1# router eigrp 23
R1#no network 192.168.52.0
R1#network 192.168.44.0
In other words the network command must be followed by an entry of an “existing” subnet.. not imaginary or not mentioned anywhere..
@ Doc , thx that makes sense to me now
However , I think u need to add:
no auto-summary , I guess at the end before saving the new config …
@NAD
Hi
i am going to appear in 2days,
pls let me know do we need to remove passive interface command by adding “NO’
or should we ignore that
pla its urgent
@ Hunterskill, on R1 it is not necessary as it will be probably present. You didn’t delete AS=23 on this router. On the other router, that you 1st delete AS, create AS again, then you add that entry since you will have deleted it with AS.
hi all,
which dump is valid, please ?
thanks.
ALLHAMDULILAH I PASS CCNA EXAM TO DAY IN ETHIOPIA I SCORE 881 PLS READ MOER IPV6,
FRAME RELAY AND ACCESS LIST THE SIM ARE SAME BUT IN EIGRP PASSIVE INTERFACE
THE REST ARE SAME GOODLUK TO ALL EXAMINER THANKS TO ALL BY HELPING ME DUMPING Z LATEST EXAM AND GIVING INFORMATION
i will took my exam in 30 minutes, i hope pass the test with this page, acme, test king and ccna library certification.
i will reply if this page work for me
Hi first of all many thanks to 9tut.com & careercert.info … cleared CCNA today got 900/1000 …got EIGRP, ACL2 and VTP i studied Actual Test 640-802 v4.2_Q647 …. Few questions were tricky so better understand concepts before appearing to exam ….. All the best to all … moving to CCNP :) ….
Took my certification exam a couple hours ago and it was a hard one. I passed with 907. The labs (Eigrp, access list 2 and vtp) are the same except for a few changes in the access list questions. They ask you to deny a few more networks but its actually the same statements you use to do it. The eigrp lab sim is the same, save for a few changes with the IP addresses and AS number. Nothing changes in the VTP lab sim. Just get your hand on the Testinside 21.14 (google it) and you’ll be able to pass this exam.
I passed the exam today with 907/1000 , It was 53 question .EGRP the first question , three drag and drop, VTP, ACL2 was the question no48. when i had only 25 minutes.it takes 15 minutes to do it.there were 7-9 questions out of the dump,but you can do it.
passed today in Los Angeles with an 881. vtp, eigrp & acl2. like many others used lammle 6th edition, mashti, 9tut sims to study. thank you 9tut, you rock dude!
took my exams today and scored 696….got 100 percent in the access-list sim but scored 0 in eigrp because i didnt remember to save my config. also i messed up my vtp sim. there were up to 18 new questions not available in dumps. i will be retaking the exam in 5 days time.
Mike
Hey guys..
In the eigrp question above to make the lab work I we need to make 2 changes
1) fix the incorrect AS on R3
2) add network 192.168.77.0 on R1
Now what I m not sure is –
why or how is network -192.168.32.0 present/configured on R1 ? Should it be removed ?
Please correct if I’m wrong
Thanks!
ignore my post above I got the answer…
pls i need latest dumbs……..checkwale2002@yahoo.com
Hi i know that some important changes have been inserted in the exam for this lab (EIGRP)
Have you more details about that? Thx. Mik
Could someone send me the lates dumps please Jeitico@hotmail.com
hi
For EIGRP new sim question, pls let me know do we need to remove passive interface command by adding “NO’ or should we ignore that. If we add NO, will be do it passive again after adding new network?
Please quick response…
i need a latest valid dumps pls send at giant1968@hotmail.com
@sbt: If the link between the 2 routers has the “passive interface” then we have to remove it because it prevents EIGRP update from being sent on that interface. If the “passive interface” is applied to the link between a host and a router then we should ignore it.
Hi ,i have completed ccna and i want to do ccnp pls let me know if any body know which simulator ,books will be useful for this.
pls send new dump
sergejcc@yahoo.fr
Thanks 9tut :)
Hi guys, ACME is not valid anymore..many many new questions are out. Learn your concepts! even with ACME,Ti and 9tut I got 766 only. :-(
Why “Internet access is working properly”?
computers can’t ping ISP router. And there is no commands for configure it.
Is it correct?
I messedupon the EIGRP question because of the “missing Defenition”. But next time i will show the paper.
@ 9tut
if we find passive interface under eigrp you said to remove it by using the command no passive-interface but in which step we have to use it
@Deepak.R: You can remove it in any step you want. When you complete the configuration, try pinging from R1, R2,R3, R4 to other interfaces to make sure it works well. If not, check if the configuration has the “passive-interface” or not -> remove if it exists.
Can someone kindly send me the latest dumps for CCNA 802 exam to cts1234586@hotmail.com
Many Thanks
@9tut
so iam gonna use this command “no passive interface” after configure terminal of R3 i.e
R3>enable
R3#configure terminal
R3#no passive interface
R3(config)#no router eigrp 22
R3(config)#router eigrp 212
R3(config-router)#network 192.168.60.0
R3(config-router)#network 192.168.77.0
R3(config-router)#no auto-summary
R3(config-router)#end
R3#copy running-config startup-config
iam i writ or wrong sir…
hi 9tut
any chang in the sim i have exam tommorw plz reply for me important. thanks
@Deepak.R:
If the “passive-interface” is inside R3 and R3 has a wrong AS number then we just need to “no router eigrp 22″, the “passive-interface” command inside will be automatically removed.
The correct configuration should be:
R3>enable
R3#configure terminal
R3(config)#no router eigrp 22
R3(config)#router eigrp 212
R3(config-router)#network 192.168.60.0
R3(config-router)#network 192.168.77.0
R3(config-router)#no auto-summary
R3(config-router)#end
R3#copy running-config startup-config
If the “passive-interface” is in the link between R1 and R3 (or R2, R4) then we have to do like this:
R1#configure terminal
R1(config)#router eigrp 212
R1(config-router)# no passive-interface fa0/0
But I read all the comments related about this “passive-interface” problem and realized that the “passive-interface” is between R1 and ISP. In this case just leave it, don’t use the “no passive-interface s1/0″ on R1 as the link between R1 & ISP doesn’t need EIGRP to run on it. A static route from R1 to ISP & “default-information originate” command in R1 are the correct answers.
Note: The “default-information originate” command in R1 will advertise the static route of R1 (to go to the Internet) to other routers (R2,R3,R4) so that they can access the Internet too.
If you have any question, please don’t hesitate to ask!
@9tut:
Can you provide example config how to apply static route and default-info originate on R1?
Sir, Eigrp question has been changed , so kindly uplaod new question , simulation is same but questions are different
I have this Sim in my exam but they asked me to allow hosts to use the internet
can anyone explain how i do that
Hey Guys. Excellent website. I gotta thank the people the post out here as well.
I took the test Jun 1st 2011 and scored 894….
I used this site and test inside (make sure is not that old).
LABS: VTP, EIGRP, ACL
On the ACL LAB the request to deny all users for all access to web server is requested.
access list 101 permit tcp host (host ID) host (server IP) eq 80
access list 101 deny IP any host (server IP)
access list 101 permit IP any any
Interface fast 0/1
ip access-group 101 out
Next stop CCDA.
Cheers from Costa Rica….
@nexus, congrats and gud luck for CCDA!! In eigrp lab have u been asked to configure NAT as well? Tel me more about the labs….
@9tut
Can you clarify about default-information originate?
RIP & OSPF uses default-information originate
EIGRP use redistribute static
thax
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So it useful for exam
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and
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Sorry i can’t mail everyone into individual
So i update in 9tut and Exam collection and it will use for all
Note:
Dont worry about commands you can use short commands in CLI (command line interface) as shown below:
1. Show mac address-table you can write in short show mac + tab it will appear full command (and please be noted don’t use show mac-address-table use only show mac address-table(don’t use ‘-‘ between mac and address, because the reason is, In new switches don’t use show mac-address-table it will commanded as show mac address-table keep it in mind this one(The command show mac address-table will display the forward/filter table, also called a CAM table on a switch))
2. Show running-config you can use as show run
3. Copy running-config startup-config you can use as copy run start
4. And more short command you can use CLI
5. In EIGRP don’t forget to add no-auto summary that to new added router because The network considered a discontiguous network because you have one classful address subnetted and separated by another classful address. Only RIPv2, OSPF, and EIGRP can work with discontiguous networks, but RIPv2 and EIGRP won’t work by default. You must use the no auto-summary command under the routing protocol configuration.
6. And don’t forget to ping to all routers when u doing lab in EIGRP and ACL don’t forget to ping and web browser to check okay
Please understand the concept and take exam when u read each question understand why this is the answer that one you know.
And Be carefull in Switching means you get one question which is root, designated by four switch mac address least mac-address will be the root bridge that port is connect to other switch. The root bridge receiving from other port that is root and second lower mac address is designated to other switch but not to root bridge.
Thank u 9tut and Exam collection
Any Regard Query or Question
Update comments in the 9tut or examcollection comments.
@N0enable: Yes, I forgot it is running EIGRP so you will not see the “default-information originate” in the configuration. Maybe we will see the “redistribute static” command there but just ignore it.